Can I make someone else the editor for the form?

Hi yingying@feetfirst.info,  

Thanks for contacting us.

If I understand your question correctly, you want to give other user editing/update rights to your form. You can achieve this by sharing your form to your sub-account users. You can check this article to know how to share forms with a sub-account user.

Do let us know if you need further assistance.

Regards.